Article 72690 of comp.sys.amiga.programmer:
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From: fnf@fishpond (Fred Fish)
Newsgroups: comp.sys.amiga.programmer
Subject: CDROM file dates - off by one day
Date: 28 Sep 1995 18:56:40 GMT
Organization: Amiga Library Services
Lines: 40
Message-ID: <44er58$j70@globe.indirect.com>
Reply-To: fnf@amigalib.com
NNTP-Posting-Host: fishpond.amigalib.com

A user of our FreshFish 10 CD reported a problem with GNU ADA (gnat) that
was attributed to the ADA runtime files having the wrong datestamps.  This
could potentially affect other programs that also check the datestamps of
files they access and expect them to have a specific datestamp.

We investigated and discovered that it appears that the dates are recorded
correctly on the CD but that two driver packages in common use on the Amiga,
AsimCDFS and Commodores 3.1 driver, return dates that are off by exactly
tne day.  Here are the raw results of checking the date of one file on
the CD (All.api) on a number of different systems:

	System		Driver		Datestamp		"Blocks Used"
	
	AmigaDOS	CBM		27-Aug-95 9:43 AM	2461
	AmigaDOS	AsimCDFS	27-Aug-95 9:43 AM	2447

	AmigaDOS	AmiCDROM	26-Aug-95 9:43 AM	2437
	AmigaDOS	FastLane	26-Aug-95 9:43 AM	2447
	AmigaDOS	Xetec		26-Aug-95 9:43 AM	2447
	AmigaDOS	Ralph Babel's	26-Aug-95 9:43 AM	2437
	Linux		Linux		26-Aug-95 9:43 AM	n/a
	FreeBSD		FreeBSD		26-Aug-95 9:43 AM	n/a
	MS-DOS		MS-DOS		26-Aug-95 9:43 AM	n/a
	MacIntosh	MacIntosh	26-Aug-95 9:43 AM	n/a

The "Blocks Used" column shows another interesting difference.  This is what
is reported in the last line of the "list" command output when doing a list
on the root directory of the CD.  Given that there are three different
values, and that I don't know the details of how that value is supposed
to be calculated, I don't know what the correct value is.

I've reported the problem to AsimWare.  I have no idea whom to report it
to at ESCOM/AT, but I'll forward a copy to Peter Kittel.

-Fred
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